Pump head



Oct. 2, .1.928. 1,686,154

L6 L. HAZEN PUMP HEAD Filed April 28, l?

2 Sheets-Sheet l INVENTR ATTORN EY oct. 2, 19211A 1,686,154 L. L. HAZEN PUMP HEAD Filed April 2s, 1925 12751113@1s-s11ee1'?, 2

- lNVEN'l-.ORv` h V ski/.Hazen WITNESSES ATTORNEY i5 out shocks,

Patented lct. 2, 1928.

.. UNITEDQSTA Irrsinn:Y L. HAZEN, F JoPLIN, MISSOURI.

I PUMP Application filed April 28 y This invention relates to an. improved Vpump head, which is especially adapted to be used in connection withdeep well pumps, and :in which /reciprocatory motion isI im- 1 Vparted to the sucker rods by meansof a crank disk and pitmaigs as' distinguished from the walking Vbeam type. The general object of f hcvinvention' is to provide a pump head of the typestated, m which is comparatively simple and inexpen-y sive in its vconstruction and light in weight, which operates noiselessly and lj with the greatest possible eiiiciency, this being secured by a light .running mechanism .withand with perfectly balanced loads. Y

The-'detailed construction of the invention audits advantages will be more fully explained 4iii vconnection with the accom o panying drawings, which illustrate one em- A bodinient thereof.

In the drawings: f Figure 1 is a side elevationl of the inven- Figure 2 is a front elevation thereof. Figure 3 is a longitudinal sectional view. Figure 4 is a transverse sectional view. Figure 5 is a' detail sectional view takenl on the line 5 5 of Figure 3.4 1- Y Y Figure 6 is a .horizontal section taken on the line 6-'64` of Figure,y 1.

.The device is .mountedv on an uprightA frame 10, which is secured toa suitable Vbase 11 above the mouthvof the well in which the sucker rods 12and 13 are adapted to -reciproc/ate, the rod 12 reciprocating inside of the rod 13, which is hollow. Cross heads 14 and 15v are secured vto the upper `ends of -the sucker rods 12 yand; 13, andare formed with p channels which areguided for reciprocation Y on vertical 'guide bars 16V and ,17' formed on f opposite sides .of the frame 10.'v As shown inl Figure 6, each of these guide bars is rab- -beted to receive cleats 18,-which are secured -tolthe respectivecross-heads, vso that the latter are limited to a vertical reciproca tory motion. n The cross heads 14`and 15 areY connected to jpitmans 19 and 20 by means of which they are reciprocated.` V

A semi-circular trough 21 is secured tothe upper end ofthe frame 10, anda complementary semi-circular cap orfhousing 22 is secured to the trough, and'in,connectiontherewith encloses the` peripheral portion of a crank disk 23. The disk 23 is adapted to besupportedzby a series of rollers 24,*whicliv Y the well.

i; oer-ic e. g

HEAD

, 1925. serial No. 26,436.

aresecured to spindles 25-within the trough i `21, the spindles being: supportedI byrball bearings 26 mounted within the sides'of the trough. VThe crank disk23 is formed with a circumferential groove 27, which is engaged by. the edges of the rollers v24 on which the disk is supported. Oppositely ldisposed wrist pins 28 are mounted in the disk 23,.

and are connected with the upper ends of the respective pitman's 19 and 20. The disk 23 is provided with series of holes 29 arranged on opposite sides of its' center, whereby the pitinans maybe ladjusted to n vary their throw, and consequently the length of the strokeof the sucker rods. i f

The disk 23 is provided with gear teeth 30 on each side of the groove 27, these teeth being engaged bythe teethA of a pinion 31 secured to a shaft 32, which is i rotatably mounted within a journal box 33 at the upper side .of the housing or cap 22.

The shaft 32 may be driven by any suitable means, -zas, for example, by means vof a ypulley 34 secured to the shaft,and connected by a beltv 35 tofa drivepulley 36 secured to the shaft 37 ofa motor 38 mounted on the base 11.

f The crank disk 23, which carries the entire load, is entirely supported by the rollers 24, which,t are mounted directly over .the well,

iectly in line with the vertical center line 'of avoids overhung loads, such as are object-ion# able in pumps of the` walking-Y beain type.

V so that the centerjof .the crank 4disk is di- ThisA insures the carrying ofthe y load directly over the center of the well, and

The sucker rods and pitma'ns are `alwaysl Aunder tension, thus avoiding buckling strains .which occur in Vthe inverted type of pump head, and in all double acting pumps.

The loa'dA is perfectly balanced. The crank pins 28 are set directly opposite each other, v`that is,v180.V apart. The perfectly balanced load on allreciprocating parts, includingthe long heavy suckerfrods, avoids they objectionable variationfof'stresses iiil herent inall. pumps' having 4 overlapping strokes. The smooth.: and Vbalancedkcrank :motion causes the'travel of the heavy sucker rods Vto' bere-versed with the .least possible shock, thereby avoiding the .unbalanced.and

destructive motion inherent in allfdouble stroke pumps lin which the: strokes overlap.

The disk `23l and.the"rollers -24 runvin a bath ofoilA which iscontained, in` the trough k21, and this lglitrunuing mechanism with i perfectly'balanced loads and the absence of shocks results in the highest possible eiliciency. By the construction, as shown` and' described, the utmost rigidity and perfect permanent alinement of the Working parts are assured. Y Y i The Wearing parts are of simple and inexpensive construction andeasily, replaced.'- when Worn. The simplicity of the construction; permits ready access tfny part of the mechanism, and permits it to be readily disassembled Whenlit is necessary to.- remove the pump from the well, Torl to dismantle it for any other reason.

While I have shown and: describedI the. detailed construction of the invention in what is at presenty regarded as the preferred em- `bodiment thereof,`it is apparent that various modifications may be made inthe vform and relation yof the. various elements thereof withouty any material departure lfrom.' the salientV features ofthe invention. Itis my purpose, therefore, to include all such modifications Within the `scope of the appended What is'claimed is:

L. In a pump head, the combination of a crank disk. disposed in a vertical plane, a semis-circular trough .adapted to contain oil, a series of rollers mountedf in` said trough on which the crank disk is supported, a semi-circular cap` secured to the trough and Y forming therewith a circular housing enclos- Y ing the peripheral portion of said crank disk,

and means for rotating said crank disk.

2. In a pump head, the combination of a Acrank-*disk disposedin-a vertical plane and Y teeth on einher having a circumferential' groove with gear side thereof, a semi-circular trough adapted to contain oil, a series of rollersmountedv insaidtrough and engag- 'a semi-circular cap secured to the trough and therewithv a circular housing en- 1 upper part of said cap and *closing* the peripheral portion of the crank dislgand. a driving pinion mounted in the v engaging the .gear teeth on the crank disk.,

3. InV a' pump head, the combination of a crank disk disposed-ina vertical plane, aV

housing enclosing the peripheral' ortion of the disk` leaving the remainder o.l thedisk exposed, said disk having a circumferential groove with gear teeth on each'side thereof within the housing, spacedrollers mounted V ngkenclosing the peripheral portion of the is leaving .the remainder of 'the disk eX- 'posed, said disk having a ycircumferentiall i groove.- Wiltlr gear teeth on: each side thereof .mg in said groove to support the crank disk,

- power driven engaging the teeth on the 'upwithin the housing, and spaced; rotatable elements mounted Within the-housing about the periphery of the disk andV engageable therewith to. center said. disk within the housing,

one of vsaid elements having gear teeth engaging the teeth of the disk, and another between them, and' a wrist pin securedlt'o thfe exposed port-ion of the disk.

6. In a pumphead, the combination offa pump head disposed in a verticali plane, an arcuate trough adapted' tofcontain oil, a plurality ofl spindles rotatably mounted in the sides of the troughy and traversing' the same, rollers secured on the respective spindles and engaging' in said groove to IIS support' the crank disk, an' arcuate cap complementary to the trough and secured thereto to Vform therewith a circular housingen` closing the peripheral portionof said! crank disk, and means for rotating said disk.

7: Inl a pumpV head, thecombination of av crank disk disposed in a vert-ical planeand having a circumferential groove with gearv teeth on 'either side thereof, an arcuate trough adapted' to contain` oil, spindles r0- tlatably mounted in the sides` of the trough and traversingy the same, rollerssecured on the respective spindles and engaging'in saidl groove to support` the crank disk, an arcuate cap complementary to the trough and forming therewith a circular housing enclosing the 'peripheral,port-ion` of said crank disk, and' a` driving ,pinion` mounted in the upper part of said cap and engaging the gear teeth on the4 crank disk.

8; A pump head comprising, in combi-nation, two pitmans for reciprocating the sucker `rods of the pump 5 a crank disk with which the two pitmans are connected', a shaft operatively connected with the crank disk for rotating the same andi operating the sucker rods; and mechanical connections between' the two pitmans and` the crank disk, so constructed and arranged that the pitmans are connectedV to the crank disk at diametrieally oppositel points and at equal vdistances from the axis of'rotation vof the crank' disk, and adjustment ofthe throw of both pitmans is permitted Without varying the equal spacingof both connections from said axis.

V9; A pump head comprising` in combination, aA pair ofv pitmans connected with the sucker rods. of the pump; a crank disk with which the two pitmans are connected at diametrically opposite points; a power driven shaft; a pinion on said shaft; said crank disk vhaving peripheral gear teeth with which the pinion meshes, the crank disk and reciprocate the sucker rods; a lubricant Itrough surrounding the lower portion of the crank disk, whose gear teeth thus pass a series of rollers within the trough supported on axes which are transverse of the trough and parallel to the axis of rotation of the crank disk;'the crank disk being supported wholly by the rollers withwhich it has lperipheral contact; the rollers fitting into a groove provided on the periphery of the crank disk, so that any movement vof the crank disk parallel to its axis of rotation is prevented; and means closing the trough and guarding the remainder of the crank disk, while permitting free movement of the pitmans. i

10. A pump head comprising, in combination, a pairof pitmans connected with the sucker rods of the pump; a crank disk with thereby to drive through a lubricant bath;

complementarily. 1 y that I' claim the foregoing metrically opposite points; apower driven shaft; a pinion on 'said shaft; said crank disk having peripheral gear teeth with which the pinion meshes, thereby to drive the crank disk and reciprocate the sucker rods; a lubricant trough surrounding the lower portion of the crank disk, Whose gear teeth thus pass through a lubricant bath; a series of rollers withinV the trough supported on aXes which are transverse of the trough and parallel to the axis of rotation of the crank. disk;

' which the two pitmans are connectedv at diathe crank disk being supported Wholly by the rollers with which it has peripheral contact; the rollers itting into a groove provided on the periphery of thevcrank disk, so that any movement of the crank disk parallel to its having flat sides and V-shaped peripheries and fitting into grooves which are shaped y In testimony, asmy own, I have hereto aiixed my signa# ture.

' LrsLE L. HAZEN.

axis of rotation is prevented; the rollers;V 

